The SFX Sci-Fi Quiz, in association with our chums at Spokenworld Audio , is available for free download now for iOS and comes with over 1,000 questions in five different categories.

There are three difficulty settings and we warn you that the hardest (known around here as the Invasive Probing setting) is so hard that even the team members who wrote the questions can't get on the high score table, so there's a challenge for you right there.

If you do score well, the app makes it easy to share your success on Twitter or Facebook. Download it now from the Apple store and let us know how you get on! The app costs precisely 0p.